Repair

Crotech Model 3305
Hi Please can anyone point me at a service guide for the above scope. Regards David ... 24 Nov 2009 05:35

SPEX DM302 P.C. ACQ. MODULE
Hello everyone, I have a problem,few days ago, I have to be repaired an interface called PC Acq. Mod DM302 manufactured by SPEX; This card receives a signal from an optical part (which is directly connected to a polarizer) and sends its output signal to the polarizer (thus creating a feedback) some days no longer ... 24 Nov 2009 10:00

Schematic for Sorensen PTM 15-3.5 linear power supply
I know, real engineers and techs don't need schematics, but it would make this a lot easier. :) It's a linear power supply with OVP and the OVP isn't working. Now, that sounds pretty simple - a pot and zener and SCR. But it's not quite that simple and it may be that someone (like me) repaired this many years ag... 23 Nov 2009 23:05

Subbing an LCD TV Power Supply
Over the past few months I've received a few cheapo LCD TVs with blown power supplies that could not be repaired, the reason being that replacement parts (or whole boards) were simply not available. Another one just came in with the same problem, and this time an idea occurred to me. The power supplies in th... 26 Nov 2009 20:53

Two phases to house - loss of neutral
I have to phases of power supply to my house - so three power lines, two phases plus neutral. I've on occasion wondered what would happen if we lost the neutral line. It seems to me that we'd then have the voltage between the two phases across two sets of appliances, one set attached to one phase, and the ot... 2 Dec 2009 23:26

Power supplies with solid polymer caps
I have read that electrolytic capacitors are the least reliable component in power supplies. I have also read that there are motherboards with solid polymer capacitors. Are there any power supplies with solid polymer capacitors? Thank you in advance for all replies. -- Whenever I hear or think of the song "Gre... 1 Dec 2009 00:42

Toshiba 42HP66 plasma help please
Hello all, First problem is an audio technician working on a plasma set. Toshiba 42HP66 (made by LG?) Has sound but no picture at all. Found FS-2, a 4 amp "T" fuse blown on the "Y Sustain" board. If fuse is replaced set won't power at all. Board too expensive to replace. Anyone know of any common fail... 21 Nov 2009 04:53

7 segment display with 4 digits
Hello everyone, someone has the pinout of this four-digit display LFU-421-2003A 44A? The dsplay was dismounted from a VCR, I'd like to reuse it to build a clock or a timer-counter Thanks to all Hello Joseph ... 19 Nov 2009 18:37

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Searching for Philips 22AR584/00 service manual
Hi, It would be really nice if someone had a scan for me. TIA Reinhard ... 13 Nov 2009 14:25